Identify the 10 differences between the two given pictures.

Three people are in a room. Ronni looks at the Nile. The Nile looks at Senthil. Ronni is married but Senthil is not married. At any point, is a married person looking at an unmarried person? Yes, No or Cannot be determined.

Before reading ahead, you must know the fact that only one of the people here is telling the truth.

A says that B is lying.
B says that C is lying.
C says both A and B are lying.

Can you find out who is speaking the truth?

In a boat, the father of a sailor's son is sitting with the son of the sailor. However, the sailor is not present on the boat.

Can this even be possible?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?

What has many teeth, but cannot bite?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

You and your two friends are working in a multinational company. How can you three find out the average salary of you all without disclosing your own salary to the other two?